The MAN motion planner enables to calculate optimized trajectories based on the changing environment of the ego vehicle. For a test of this system-under-test, it is vital to identify critical situations by running closed-loop simulations with varying parameters. This is realised in the web-based solution dSPACE SIMPHERA. Furthermore, modelling standards such as OSI (Open Simulation Interface) and FMI (Functional Mock-up Interface) are integrated.